UltraAspire Alpha 2.0 Race Vest Bladder Hanging System makes it easy to load or unload bladder while on the go 2 Liter (70 oz) reservoir with Plug-N-Play connector Exterior bungee provides load compression or additional storage Flexible perimeter binding eliminates chafing while wicking away moisture Elastic Mesh Stash Pockets at the side for additional hydration, energy gels, or other essentials